What is the difference between a TT and an ETT? And what makes the PS decide which procedure to perform?

Thank you for your question.The difference between a tummy tuck and an extended tummy tuck is essentially the length of your incision.  A tummy tuck incision typically goes from hip to hip, while an extended tummy tuck incision is slightly longer and can extend around a patients hips towards the spine.  The length of your incision is determined by the amount of skin that needs to be removed and the location of this skin.  A true tummy tuck addresses only excess abdominal skin, but an extended tummy tuck can address skin laxity of the flanks and lower back that typically results from significant weight loss.  I hope that you find this helpful and I wish you all of the best!

An extended tummy tuck is used when there is excess skin in your abdomen beyond the usual TT limits. Some tummy tucks are so extended they are circumferential around to the back, called a Belt abdominoplasties or full body lifts. Thank you for your question and good luck.

Thank you for your question. 
The difference is basically the length of the scar, the conventional tummy tucks the scar is going hip to hip in the abdominal area only in the extended tummy tuck the scar extends to the back of your body. Some patient needs to remove the excess of adipose tissue and skin of the back areas and flanks to reduce the love handles. Sometimes the conventional tummy tuck can result in ear dog formation because of lack on extended the incision to the back of the body. Please make sure to discuss with your Board Certified Plastic Surgeon before the procedure. Good luck :)